Transform stream factory to calculate the difference between successive streamed data values.
$ npm install flow-diffTo create a stream factory,
vardiffStream=require('flow-diff');// Create a new factory:vardStream=diffStream();To create a new difference stream,
varstream=dStream.stream();Methods are chainable.
diffStream().stream().pipe(/* writable stream */);vareventStream=require('event-stream'),dStream=require('flow-diff');// Create some data...vardata=newArray(1000);for(vari=0;i<data.length;i++){data[i]=Math.round(Math.random()*10);}// Create a readable stream:varreadStream=eventStream.readArray(data);// Create a new difference stream:varstream=dStream().stream();// Pipe the data:readStream.pipe(stream).pipe(eventStream.map(function(d,clbk){clbk(null,d.toString()+'\n');})).pipe(process.stdout);To run the example code from the top-level application directory,
$ node ./examples/index.jsUnit tests use the Mocha test framework with Chai assertions.
Assuming you have globally installed Mocha, execute the following command in the top-level application directory to run the tests:
$ mochaAll new feature development should have corresponding unit tests to validate correct functionality.
Copyright © 2014. Athan Reines.